DeltaBlue is a one-way constraint solver, originally written in Smalltalk by John Maloney and Mario Wolczko.

It is frequently used as a benchmark to evaluate the cost of polymorphism in different language implementations.

This repository contains a port of JavaScript version of DeltaBlue from V8 Benchmark Suite[1] to Lua.

JavaScript version heavily uses global variables which is considered a bad taste in Lua so two versions of translation are provided:

    deltablue-globals.lua - all global variables from JS version became global variables in Lua version

    deltablue-locals.lua - most global variables from JS version became local variables in Lua version 

A runner script that performs 10000 iterations of the benchmark is included for convenience.

Usage:

    % lua deltablue-10000iterations.lua locals
    % lua deltablue-10000iterations.lua globals

To measure original version:

    % shell deltablue-10000iterations.js 


[1] http://v8.googlecode.com/svn/data/benchmarks/v6/README.txt